Heel-compressing machine.



J. F. STANDISH.

HEEL COMPRESSING MACHINE. APPLICATION FILED MAR. 10, ms.

Patented Dec. 12, 1916.

4 SHEETS-SHEET I.

l V/T/VESSESL VE/V 747R. 24% W I /M J. FJSTANDISH HEEL COMPRESSLNG MACHINE.

APPLICATION FILED MAR-10.1915.

Patented Dec. 12, 1916.

4 SHEETSSHEET 2.

A/fSSfSl a 7 z 6 M MZ/VESSES J. F. STANDISH.

HEEL COMPRESSING MACHINE.

LICATI 1,207,807; Patented Dec. 12, 1916.

4 EEEE TS EEEEE 3- J. F. STANDISH.

HEEL COMPRESSING MACHINE.

APPLICATION FILED MAR. 10. I915.

Patented Dec. 12, 1916.

4 SHEETS SHEET 4 I overcome the liability of damaging the maa ppm) STAT JOHN F. STANDISH, OF WINTHROP, MASSACHUSETTS, ASSIGNOR T0 UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

HEEL-COMPRESSING MACHINE.

aoaeor.

Specification of Letters Patent.

Patented Dec. 12, 1916.

To all whom it may concern Be it known that N-F. STANDISHa fected and the machine, which normally operates continuously, is not stopped.

a citizen of the United States, residing at 5 While I have selected the particular type Winthrop, in the county of Suffolk and State of Massachusetts, have invented cer tain Improvements in Heel-Compressing Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters'on the drawings indicating like parts in the several figures.

This invention relates to safety devices for compressing machines, and more particularly to a safety stop-mechanism for stopping the operation of a compressing machine when no blank to be operated upon is supplied to it.

In the operation of machines used for compressing heel blanks there is sometimes a failure to present a blank to the machine and the machine is allowed to go through a cycle of operations without a blank in the mold. This is very detrimental to the mold and, in the case of a top lift mold, is liable practically to ruin the dies.v

The object of the present invention is to shine under the conditions above mentioned.

The invention comprises automatic mechanism for stopping the approaching move ment of the compressing dies before they have come into engagement with each other, in the event of failure to supply a blank to the compressing machine.

The invention is herein illustrated and described as applied to a machine of the same general type as that shown in U. S. Patent No. 776,828, Allen, granted Dec. 6, 190%, and, in the embodiment of the invention which is hereinafter specifically described, the desired result is attained by the provision of a finger arranged to engage a blankafter it has been deposited in the feed mechanism of the machine and connected to the starting and stopping mechanism in such a manner that if it finds no blank to engage, the machine will automatically be stopped. In case a blank has been deposited in the feeding mechanism in proper position to be engaged by the finger, the operative connection between the finger and the starting and stopping mechanism is not efof compressing, machine and specific em- 111g machines and embodied in other forms without the loss of its identity and without sacrificing many of its advantages.

In the drawings, Figure 1 is a front elevation of a compressing machine provided with a safety device embodying the invention; Fig. 2 is a perspective view, on an enlarged scale, of the safety mechanism; Figs. 3, 1 and 5 are fragmentary views showing the essential parts of the safety mechanism in different positions; and Fig. 6 is a View showing a detail of the treadle controlling mechanism.

The numeral 10 indicatesa compressing machine of the type shown in the patent hereinbefore referred to. The usual compressing dies 12 are mounted in mold slides 14 which are movable horizontally toward and from each other on the upper face of a vertically movable cross head 16 and are movable vertically with the crosshead. 18 indicates. a pair of gripper fingers forming a clamp in which the blanks are deposited by hand, and by which they are carried into position to be delivered to the compressing ies.

The operation of the devices just described is so timed that as the cross head 16 descends, the mold slides 14 recede from each other, opening the mold, and the feed clamp advances toward the mold to deposit a blank therein; while during the ascending movement of the cross head the reverse of these operations takes place.

It hasbeen found in practice that if the compressing dies are allowed to come together without any resistance, that is to say, with no blank to be compressed in the mold, they are frequently damaged, and in the case of a shallow mold, such as is used in compressing top lifts, the mold is usually ruined. In order to avoid this damage, it is necessary that the machine be not permitted to go through its cycle of operations when a blank to be operated upon has not been supplied to it. To meet this condition, I have so organized the machine that, in the absence of a blank in the gripper fin gers at the beginning of their movement toward the mold, the machine will automatically be stopped.

The starting and stopping of the machine is controlled by a treadle 18, pivoted at 20 and provided with a lever arm 22 which operates a belt shipper 24;. The belt shipper shifts the belt from a loose pulley 26, upon the driving shaft of the machine, to a tight pulley 28, or vice versa. The spring tends to hold the treadle elevated, with the belt running on the loose pulley. Under these conditions the-machine is stopped. lVhen it is desired to start the machine, the operative steps upon the treadle, shifting the belt to the tightpulley 28, whereupon the machine operates continuously as long as the treadle is held depressed.

- A bracket 32, bolted to the machine frame, has an auxiliary locking treadle 84: pivoted init at 36. The treadle 3 1 is provided with a downward extension 38 which, when the treadle is elevated, engages the upper edge of a plate 10, secured to the treadle 18, and locks the treadle 18 in its depressed position with the compressing machine running. The bracket 32 is also provided with a vertical bearing portion 44, which serves as a guide for the lower end of a rod. 46 arranged for vertical sliding movement. The rod 16 is provided with a member 18 adjustably connected to it-and pivoted at 50 to the forwardly extending portion of the treadle 34;.

A compression spring 52 surrounding the rod 46 bears upon the bearing L4: and a collar 541 secured to the rod 46, tending to elevate'the rod and the treadle 34:. In this position, as above stated, the extension 88 acts as a locking device to hold the treadle 18 depressed, but when the treadle 34 is depressed, either through the medium of the rod 46 or by stepping upon the treadle itself,

the treadle 18 is released and is then ele vated by the spring 30; stopping the machine. The plate 40 is formed with a wedgeshaped face 12 cooperating with he extension 38 in such a fashion as to throw the latter rearwardly when the treadle 18 is depressed. When the depression is suflicient, the member 38 moves forwardly into looking position.

The upper end of the rod 4:6 is guided in a bearing 56 forming part of a bracket 58 bolted to the frame of the machine. The bracket 58 has a downwardly projecting portion 60, at the lower end of which is pivoted a bell crank lever 62. The arm 64: of the bell crank lever projects laterally to V a position above the path of the blank being fed into the machine by the gripper fingers 18, and is provided at its end with a finger 66 which is mounted adjustably and arranged to engage a blank held in the grip-- pers. The other arm 68 of the bell crank lever projects downwardly and has a cam roll 70 at its lower end.

A collar 72 is adjustably secured to the rod 16 by a clamping bolt 74-, and an operating hook 76 is pivoted to the collar 72 at 78. A spring 80 tends to move the hook to the right as seen in Fig. 3, an adjustable stop 82 serving to limit the movement of the hook under the influence of the spring. The fi1nction of the operating hook is to depress the rod 46, and this result is accomplished by mechanism under control of the bell crank lever 62 which will now be described.

A plate 81 is secured to one of the mold slides 1% and moves therewith. A cam block 86 is mounted upon the plate 81- with a screw and slot connection in a manner to permit vertical adjustment of the block relative to the plate. The block 86 is rabbeted, as shown at 88, and a cam member 90 is pivotally mounted in the rabbet. A stop screw 92 in the member 90 adjustably limits its movement about its pivot. The members 90 and 86 are so formed and related to each other that a continuous cam face 92 is provided for cooperation with the cam roll 70. The continuity of the cam face is maintained when the member 90 moves about its pivot by a. tongue 94 upon the said member which enters a corresponding groove in the block 86. The side face 96 of the block 86 forms a continuation of the cam face 92.

A switch latch 98, pivoted at 100 in the block 86, is normally held in the position shown in Fig. 3, by a laterally extending weight 102, but may be swung to the right by the cam roll 70 under certain conditions which will be described hereinafter. A torsion spring 10-1 surrounding the pivot of the bell crank lever 62 tends to move the lower end of the lever and the cam roll 70 thereon, toward the left, as seen in Fig. 3. I

A tooth 106 upon the cam member 90 is arranged to engage the hook 76 when the cam member is swung to the left, and a normally stationary cam 108 mounted for vertical adjustment upon the machine frame by means of a bolt and slot connection 110 controls the engagement and disengagement of the tooth 106 and the hook 7 6. i

From the foregoing, it will be understood that the pivot of the bell crank lever 62 is stationary and consequently the cam roll 70 does not move vertically, while the cam block 86, the swinging cam member 90 and the switch latch 98 all move together. both vertically and laterally with the mold slide 14: upon which they are mounted. The operating rod 16 moves vertically in stationary guides 44 and 56 upon the frame of the machine, being elevated by the spring 52 and depressed by the hook 76 against the tension of the spring. The cam 108 is stationary and controls the engagement and disengagement of the tooth 106 and the hook 76.

The operation is as follows: Assuming the cross head 16 to be down, the parts will occupy the relative positions shown in Fig. 3. As the cross head moves upwardly, the feeding clamp 18 is retracted fro-m the mold, moving forwardly into blank receiving position, where a blank is deposited in the clamp. As the cross head rises the mold slide 14, carrying the cam mechanism 86, 90, 98, rises and moves toward the right, the cam roll 70 during this time bearing against the right face 96 of the block 88 and the face of the switch latch 98, forming a continuation thereof. When the head has risen nearly to its upward limit, the lower end of the switch latch passes above the cam roll 70 allowing the spring 104 to throw the lat ter to the left, as shown in Fig. 4. If a blank 112 has been placed in the feed clamp by the operative, it will at this time be in position to be engaged by the finger 66, and the parts will be so adjusted that by the engagement of the finger with the blank, the cam roll 70 will be prevented from moving farther toward the left than the position shown in Fig. 4. Under these conditions, the cam roll does not swing the member 90 to the left sufliciently to cause the tooth 106 to engage with the hook 76 and as the cross head again descends, the roll 70 travels up the cam face 92, throwing the switch latch 98 to the right, and passes out again upon the face 96, after which the switch latch again falls back into the position shown in Fig. 3. The cam face 92 operates the bell crank lever in such a manner as to raise the linger 66 from the blank in time to permit the blank to be fed into the mold, as usual,

and inasmuch as the tooth 106 has not been thrown into engagement with the hook 76, the rod 46 is not moved, and the machine continues to run. If, however, there has been a failure to introduce a blank into the feeding clamp at the proper time, the finger 66 will find no blank with which to come into engagement at'the time when the parts assume the position shown in Fig. 4, and consequently the cam roll 70 will be thrown farther toward the left into the position shown in Fig. 5 where it has thrown the lower end of the cam member 90 to the left sufficiently to cause the tooth 106 to engage the hook 7 6 when the cross head begins to descend. The downward movement of the member 90 then depresses the hook 7 6 and the rod 46 by which it is carried, until the treadle 34 is depressed sufiiciently to remove the extension 38 from looking relation to the treadle 18, permitting the spring 30 to raise the latter, shift the belt to the loose pulley 26 and stop the machine. The forma- 65 tions of the faces 114 and 116 of the cam 108 which are engaged respectively by the hook 7 6 and the lower end of the member 90 are such that after the rod 46 has been depressed sufiiciently to release the treadle l8 and stop the machine, the hook 76 has been moved to the left, and the member 90 has been moved to the right sufliciently to disengage the tooth 106 from the hook, permitting the member 90 to move downwardly somewhat past the point of the cam 108 before the machine has entirely stopped. After the disengagement of the tooth 106 and the hook 76, the spring 52 elevates the rod 46 throwing the locking extension 38 forward again.

It will be seen from the foregoing description that, after the machine has been started by stepping upon the treadle 18, the starting and stopping mechanism is held locked in such a position that the machine will run continuously until there is a failure to supply a blank to the feeding mechanism, whereupon the machine will be stopped automatically before the mold has been closed and damaged. The treadle 34 permits the operative to stop the machine at any time he may desire, without allowing the automatic mechanism to operate.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. In a machine for compressing heel blanks, the combination of compressing mechanism, and means controlled by the compressing 'mechanism for stopping the operation of the compressing mechanism upon failure to supply a blank thereto.

2. In a machine for compressing heel blanks, the combination of compressing mechanism, manually operable means for starting and stopping the machine, and automatic means controlled by the compressing mechanism for stopping the machine upon failure to supply a blank thereto.

3. In a machine for compressing heel blanks, the combination of compressing mechanism, manually operable means for starting operation of the compressing mechanism, means for locking the starting means in operating position, and automatic mechanism for unlocking the starting means controlled by the compressing mechanism.

4. In a machine for compressing heel blanks, the combination of compressing mechanism, manually operable means for starting the machine, means tending normally to move the starting means into position to stop the machine, a lock for holding the starting means in operating position, and automatic mechanism controlled by the compressing mechanism for unlocking the startlng means.

5. In a machine for compressing heel blanks, the combination of compressing mechanism, manually operable means for starting the machine, means for locking the starting means in operating position, automatic means controlled by the compress ing mechanism for releasing the lock, and manually operable means for releasing the lock.

6. In a machine for compressing heel blanks, the combination of compressing mechanism, manually operable means for starting the machine, automatic means for locking the starting means in operating position, automatic means controlled by the compressing mechanism for releasing the loclnand manually operable means for releasing the lock.

7. In a machine for compressing heel blanks, the combination of compressing v mechanism, a manually depressible treadle for starting the machine, a lock for holding the treadle depressed, and automatic means controlled by the compressing mechanism for unlocking and elevating the tre-adle.

8. In a machine for compressing heel blanks, the combination of compressing mechanism, a manually operable starting treadle, an automatic lock for holding the starting treadle in operating position, means mechanism, depending for its operationv upon the non-engagement of the blank en gaging member with a blank for releasing the lock to stop the machine.

10. In a machine for compressing heel blanks, the combination of a manually operable, spring retracted, starting treadle, a spring actuated lock for holding the treadle depressed, a sliding rod for releasing the lock, a hook on the rod, a movable member for engaging the hook and operating the rod, and a cooperating blank engaging member controlling the engagement or non- .engagement of the movable member with the hook.

11. In a machine for compressing heel blanks, the combination of compressing mechanism, means for feeding a blank to the compressing mechanism, and means controlled by the compressing mechanism for stopping the operation of the machine upon failure to supply a blank to the feed ing means.

12. In a machine for compressing heel blanks, the combination of a continuously operating compressing mechanism, blank feeding mechanism and means, controlled by the compressing mechanism and dependent for its operation upon the presence or absence of a blank in the feeding mechanism, for stopping the operation of the compressing mechanism.

13. In a compressing machine, the combination of compressing dies, a blank holder for conveying a blank to the dies, means for controlling the starting or stopping of the machine, a movable blank engaging finger and connections between the blank engaging finger and said means, which are continuous when the finger is in one position, and interrupted when the finger is in another position, said connections being under the control of the compressing dies.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

JOHN F. STANDISI-I.

Witnesses:

J AMES 0. VVRIGIIT, WILLIAM B. KING.

Copies of this patent mav be obtained for five cents each, by addressing the Commissioner of Patents.

- 7 Washington, I).- G. 

